Effect of Zr content on crack formation and mechanical properties of IN738LC processed by selective laser melting

doi:10.1016/S1003-6326(21)65582-6

	Effect of Zr content on crack formation and mechanical properties of IN738LC processed by selective laser melting
	Hu, Yong 1,2; Yang, Xiao-kang 1,2; Kang, Wen-jiang 1,2; Ding, Yu-tian 1,2; Xu, Jia-yu 1,2; Zhang, Hui-ying 1,2
刊名	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
	2021-05
卷号	31 期号:5 页码:1350-1362
关键词	selective laser melting IN738LC alloy Zr content solidification crack process parameter optimization mechanical properties
ISSN号	1003-6326
DOI	10.1016/S1003-6326(21)65582-6
英文摘要	Two batches of commercial IN738LC alloy powders with different Zr contents were printed under the same parameters. The influences of Zr content (0.024 wt.% and 0.12 wt.%, respectively) in powders on crack density, distribution, formation mechanism and mechanical properties of selective laser melting (SLM)-treated parts were systematically studied. It was found that the crack density (area ratio) increases from 0.15% to 0.87% in the XOY plane and from 0.21% to 1.81% in the XOZ plane along with the Zr content increase from 0.024 wt.% to 0.12 wt.% in the original powders. Solidification cracks are formed along the epitaxially grown < 001 >-oriented columnar grain boundaries in molten pool center. The ultimate tensile strength of Sample 1 (0.024 wt.% Zr) is 1113 MPa, and there are dimples in tensile fracture. With an increase in the Zr content to 0.12 wt.% (Sample 2), the ultimate tensile strength of Sample 2 decreases to 610 MPa, and there are numerous original cracks and exposed columnar grain boundaries in tensile fracture. The optimization of printing parameters of Sample 2 considerably increases the ultimate tensile strength by 55.2% to 947 MPa, and the plasticity is greatly improved.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000660035300001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148594]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Hu, Yong,Yang, Xiao-kang,Kang, Wen-jiang,et al. Effect of Zr content on crack formation and mechanical properties of IN738LC processed by selective laser melting[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2021,31(5):1350-1362.
APA	Hu, Yong,Yang, Xiao-kang,Kang, Wen-jiang,Ding, Yu-tian,Xu, Jia-yu,&Zhang, Hui-ying.(2021).Effect of Zr content on crack formation and mechanical properties of IN738LC processed by selective laser melting.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,31(5),1350-1362.
MLA	Hu, Yong,et al."Effect of Zr content on crack formation and mechanical properties of IN738LC processed by selective laser melting".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 31.5(2021):1350-1362.